Added PLAIN and LOGIN authenticators which use the 'crypt' database field instead of 'clear'.
Added PLAIN and LOGIN authenticators which use the 'crypt' database field instead of 'clear'.

runout-at/vexim2,runout-at/vexim2,avleen/vexim2,Udera/vexim2,runout-at/vexim2,Udera/vexim2,avleen/vexim2,avleen/vexim2